On Thu, Apr 07, 2011 at 10:14:03AM +0900, Yoshiaki Tamura wrote: > 2011/3/29 Josh Durgin <josh.dur...@dreamhost.com>: > > The new format is > > rbd:pool/image[@snapshot][:option1=value1[:option2=value2...]] > > Each option is used to configure rados, and may be any Ceph option, or > > "conf". > > The "conf" option specifies a Ceph configuration file to read. > > > > This allows rbd volumes from more than one Ceph cluster to be used by > > specifying different monitor addresses, as well as having different > > logging levels or locations for different volumes. > > > > Signed-off-by: Josh Durgin <josh.dur...@dreamhost.com> > > --- > > block/rbd.c | 119 > > ++++++++++++++++++++++++++++++++++++++++++++++++++-------- > > 1 files changed, 102 insertions(+), 17 deletions(-) > > > > diff --git a/block/rbd.c b/block/rbd.c > > index cb76dd3..bc3323d 100644 > > --- a/block/rbd.c > > +++ b/block/rbd.c > > @@ -22,13 +22,17 @@ > > /* > > * When specifying the image filename use: > > * > > - * rbd:poolname/devicename > > + * > > rbd:poolname/devicename[@snapshotname][:option1=value1[:option2=value2...]] > > I'm not sure IIUC, but currently this @snapshotname seems to be > meaningless; it doesn't allow you to boot from a snapshot because it's > read only. Am I misunderstanding or tested incorrectly?
Read-only block devices are supported by QEMU and can be useful. Stefan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
